JP2017043363A - Discharge port plug, and paper container integrating the discharge port plug - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a discharge port plug having a sufficient rigidity without being broken due to ultrasonic vibration applied during fusion, and capable of being easily removed, at dismantlement, from a paper container to which the discharge port plug is fused.SOLUTION: A discharge port plug (2) comprises: a cylindrical side wall (22); and a disk-like flange part (21) provided extending from a vicinity of a lower end of the side wall to the outside. In the discharge port plug, annular recessed parts (211) are arranged to be partitioned by a plurality of ribs, at an inner diameter side with respect to a fusion area between a paper container opening (11) and the flange part (21). The plurality of annular recessed parts are arranged in a multiple-concentric-circular shape.SELECTED DRAWING: Figure 1

Description

  The present invention relates to liquids such as fruit juice drinks, coffee, liquid soups, tea-based drinks, soft drinks, sake, wine, and the like used for containers made of laminated sheets containing powders and granules, The present invention relates to a spout stopper and packing that can be easily combined by ultrasonic fusion, such as a gasket fused to a cap.

Conventionally, a sheet material provided with a sealant layer made of thermoplastic resin using paper as a base material, or a barrier layer such as an aluminum foil, an aluminum vapor-deposited film, or an inorganic oxide vapor-deposited film between the base material and the sealant layer. A packaging container formed by folding a laminated sheet material into a box shape and overlapping and sealing the end portions is known. (Patent Document 1, FIG. 9)
There are various forms of such packaging containers, and one of them is a pouring of the contents by providing a spout cap formed of polyethylene resin or the like on an inclined top plate of a gobel top type. Packaging containers with outlet plugs are known.
In the case of such a packaging container, it is preferable to separate plastics such as spout stoppers and sheets such as a container body using paper as a base material for separation and collection.
As a method of separating these plastics and sheets, there is a method of opening the top seal portion and cutting the sheet material around the spout plug with scissors or the like.
However, since such a packaging container usually has a strong seal at the top seal part, it is not easy to disassemble the container, and it is dangerous to cut with a pinch or a cutter, and it takes time and effort. In many cases, the spout stopper is discarded as it is without being separated from the packaging container.

Patent Document 2 proposes a paper packaging body in which a spout stopper in which an annular thin portion is formed on the inner peripheral upper surface of an annular body (flange portion) is attached to a paper container in which a folding guide line is formed.
According to this paper packaging body, by folding the paper packaging body along the folding guide line, the annular thin wall portion is broken, and the tubular body of the spout stopper can be separated from the paper container.

JP 2003-335362 A Japanese Patent No. 5469421

  However, if the annular thin part is formed in the spout stopper as in Patent Document 2, the rigidity of the flange part of the spout stopper is reduced. For this reason, at the time of fusing to a paper container, the shape of the flange portion is not stable and welding unevenness occurs, which may cause liquid leakage. In addition, if welding is performed with high energy to prevent this, the spout stopper may be damaged from the thin wall portion by ultrasonic vibration.

  The present invention has been made in view of such problems, and provides a spout stopper that has sufficient rigidity and is not damaged by ultrasonic vibration during welding and a paper container using the spout stopper. This is the primary purpose.

  A second object of the present invention is to provide a spout stopper that can be easily separated upon disassembling a paper container having a spout stopper fused thereto, and a paper container using the spout stopper.

One aspect of the present invention for solving the above invention is:
A spout stopper used by fusing to a paper container opening,
A cylindrical side wall;
A disc-shaped flange provided to extend outward from the vicinity of the lower end of the side wall;
On the inner diameter side from the fusion region with the paper container opening of the flange portion, the annular recess is arranged by being partitioned by a plurality of ribs,
A spout stopper, wherein a plurality of the annular recesses are provided concentrically.

The second aspect of the present invention is
A plurality of concentric circular recesses are provided on the bottom surface opposite to the side wall of the flange portion,
The inner annular recess is a spout stopper that forms a portion to be cut.

  The spout stopper of the present invention has a sufficient rigidity, is not broken even by ultrasonic vibration during welding, and can be easily separated when the packaging container is disassembled, and a paper container using the spout stopper Can be provided.

It is sectional drawing and bottom view of the spout stopper which concerns on one Embodiment of this invention. It is a perspective view of the container concerning one embodiment of the present invention. It is an expanded view of the container main body which concerns on one Embodiment of this invention. It is a perspective view which shows the process of isolate | separating the spout stopper which concerns on one Embodiment of this invention from a container. It is a perspective view which shows the other method of isolate | separating the spout stopper which concerns on one Embodiment of this invention from a container. It is a perspective view of the example applied to the flat top type paper container concerning one embodiment of the present invention. It is sectional drawing and the top view of the spout stopper which concern on 2nd embodiment of this invention. It is sectional drawing and the top view of the spout stopper which combined one Embodiment and 2nd Embodiment of this invention. It is sectional drawing and a top view of the spout stopper with an outer annular recessed part by the conventional spout stopper. It is sectional drawing and a top view of the spout stopper which has only one outer annular recessed part as a comparative example.

Hereinafter, embodiments of the spout stopper of the present invention will be described in detail with reference to the drawings.
As shown in the cross-sectional view of FIG. 1-1 fused to the container 1, the spout stopper 2 of the present invention has a cylindrical side wall 22 and a disc shape provided so as to extend outward from the vicinity of the lower end of the side wall. The flange portion 21 is formed.

A male screw 221 that is screwed into the cap is provided on the outer side of the side wall 22, and a closing plate 231 of the pull top 23 is provided on the inner side, and is connected to the inner side of the side wall via a weak line 230. On the side, a pull ring 2311 connected to the closing plate 231 by a pillar 2312 is provided.
A pedestal 24 is provided at the lower end of the side wall, and the flange portion 21 extends horizontally from the lower end of the pedestal 24 and is fused to the inside of the opening 11 of the paper container 1.

A plurality of annular recesses 211 are concentrically provided on the bottom surface of the flange on the side opposite to the side wall of the flange portion 21.
A large R is provided on the top of the outer annular recess 2111 on the outer side at the tip of the recess in the width direction. This makes it difficult for the outer annular recess 2111 to break due to vibration during ultrasonic fusion. Further, by absorbing the ultrasonic vibration at the time of fusion at the outer annular recess and preventing the ultrasonic vibration from being conducted to the inner annular recess, the inner annular recess is prevented from being damaged and melted at the time of fusion with the container. Responsible for absorbing excess flange flanges.

Further, the top surface of the inner inner annular recess 2112 is provided with a corner having no R or a small R at the leading end of the recess in the width direction. The inner wall of the inner annular recess 2112 is provided in the vicinity of the standing wall 241 of the base 24. In other words, the inner wall of the inner annular recess 2112 may be provided in the vicinity of directly below the standing wall 241 or at a position inside the standing wall 241.
As a result, when the spout stopper 2 is fused to the container 1, the ultrasonic fusion horn is surely displaced from directly above the inner annular recess 2112 so that the annular recess is not damaged by the ultrasonic vibration of the horn. .
In this way, when the spout stopper 2 is separated and broken, the breakage of the inner annular recess 2112 is surely started from the corner of the recess.
Basically, the ultrasonically vibrating horn for fusing the spout stopper 2 and the container 1 is set so as to hit the outside of the outer annular recess 2111 and the inner annular recess 2112.

FIG. 1-2 is a bottom view of the spout stopper 2 as viewed from the bottom side.
A pull-top closing plate 231 is in the center and is connected to the side wall by a weak line 230.
A pedestal stealing 242 is provided in the vicinity of the side wall and the lower end of the pedestal. This meat steal becomes a recess and is partitioned by a rib, but the rib may not be provided, or it may be a simple step.
An inner annular recess 2112 and an outer annular recess 2111 are provided concentrically outside the pedestal stealing 242. Some parts are shown in an enlarged view for easy understanding.

The outer annular recess 2111 and the inner annular recess 2112 are provided with a plurality of ribs, and the outer annular rib 21110 of the outer annular recess 2111 adjacent to the inner and outer sides and the inner annular rib 21120 of the inner annular recess 2112 are shifted from each other, Provide alternately.
For this reason, it is preferable that the outer ring rib 21110 and the inner ring rib 21120 have the same number of ribs in the annular recess.
Furthermore, in the rib shape of the plurality of annular recesses, the outer ring rib thickness A of the outer annular recess is made larger than the inner ring rib thickness B of the inner annular recess.
This is to increase the strength of the flange in the outer annular recess so that it is not easily damaged by ultrasonic vibration.

Further, the thickness CA of the flange portion in the outer annular recess and the thickness CB of the flange portion in the inner annular recess are thinner than the inner ring rib thickness B of the inner annular recess and smaller than the ring width D of the annular recess.
And thickness CA and CB of the flange part in an annular recessed part shall be 0.2 mm or more and 0.3 mm or less. This is because when the thickness is less than 0.2 mm, cracks may occur during ultrasonic fusion with the container body, and when the thickness is 0.3 mm or more, cutting becomes difficult.
Preferably, 0.23-0.3 mm is preferable.

Furthermore, the width DA of the outer annular recess and the width DB of the inner annular recess are 0.3 mm or more, preferably 0.5 mm or more.
This is because when the thickness is less than 0.3 mm, the strength of the injection mold is low and the durability may be reduced.

FIG. 2 is a container 1 in which the spout stopper 2 of the present invention is fused. FIG. 2-1 is a perspective view seen from the front side 122 side connected to the upper inclined surface 111 to which the spout stopper is fused, and FIG.
It is the perspective view seen from the side.
A bend line 100 passing through the center of the opening 11 where the spout stopper 2 is fused is horizontally provided on the upper inclined face 111 and the upper back inclined face 114 where the spout stopper is fused.

  FIG. 3 is a development view showing a blank for manufacturing the container 1 shown in FIG. A fold line 100 passing through the center of the opening 16 passes through all the upper surfaces constituting the upper portion 110.

FIG. 4 shows a step of removing the spout stopper 2 after the contents of the paper container fused with the spout stopper 2 of the present invention shown in FIGS. 3 and 2 are poured out.
FIG. 4A is a crushing process in which the left and right side surfaces of the paper container 1 are bent and folded inward to crush the paper container flatly.
In the next folding step, a force is applied so that the folded paper container can be folded at a folding line 100 by a ruled line as shown by an arrow in FIG. 4-1. Then, as shown in FIG. 4B, the side wall 22 and the pedestal 24 of the spout stopper 2 are not bent and are broken at the inner annular recess 2112 of the flange.
The half of the broken flange that is partitioned by the fold line 100 is broken, but the other inner annular recess 2112 is also thin, and the half of the broken flange is a trigger, and the base of the spout plug can be easily It can be broken between the remaining flanges and removed.

FIG. 5 also shows an example of a paper container in which the folding line 100 runs in the vertical direction of the container in the process of removing the spout stopper 2 after pouring out the contents of the paper container fused with the spout stopper 2 of the present invention. It is.
FIG. 5A is a crushing process in which the left and right side surfaces of the paper container 1 are bent and folded inward, and the paper container is flattened.
In the next folding step, a force is applied so that the folded paper container can be folded along a vertical folding line 100 by a ruled line as shown by an arrow in FIG. Then, as shown in FIG. 5B, the fold line 100 is bent vertically, and the side wall 22 and the pedestal 24 of the spout stopper 2 are not bent and are broken at the inner annular recess 2112 of the flange.
The fold line 100 in this direction is bent at the left and right side surfaces, has no right and left side plates, and is easy to bend. Therefore, the fold line 100 can be bent with a small force.
The half of the broken flange that is partitioned by the fold line 100 is broken, but the other inner annular recess 2112 is also thin, and the half of the broken flange is a trigger, and the base of the spout plug can be easily It can be broken and removed from the other half of the flange.

  FIG. 6 is an example applied to a paper container of a flat top instead of a gobel top, where the flat top is bent and fused by half of the top surface, and the spout 2 is bent from the top by folding the top plate. Although it needs to be peeled off, a corresponding spout plug can be used. In this case, even if the top portion is not peeled off, the strength of the top plate is high. Therefore, the top plate can be broken simply by pushing down the side wall 22 of the spout stopper.

FIG. 7 shows an example of a spout stopper in which a plurality of annular recesses having a plurality of ribs are concentrically provided in the fusion region on the upper surface on the side wall side of the flange portion. This spout plug is a plug that can be fused even if it has a soft flange, and has an annular recess 25 on the fused surface to be fused, and the annular recess is partitioned by a plurality of ribs. ing.
The plurality of annular recess ribs 253 are formed such that the rib position of the inner annular recess 252 adjacent to the inside and the outside and the rib position of the outer annular recess 251 are shifted from each other.
The rib 253 of the annular recess serves to prevent the horn 4 that oscillates ultrasonic waves from falling into the recess. In addition, the ultrasonic vibrations can be uniformly applied to the fusion surface, even if the ribs and dents are hardly adjusted for the fusion between the paper container 1 and the flange of the spout stopper 2 that usually require delicate height adjustment. It became possible to fuse evenly.
In addition, when fusion is performed by this method, even if the welding pressure, amplitude, and work amount, which are welding conditions, are reduced, the fusion property is not significantly lowered, and stable fusion can be performed.
Furthermore, since this spout plug is not made of an energy director with a convex fusion part, there is no problem that the spout plugs get caught during transportation, and even if a stopper is attached to the pedestal end, There is an advantage that the problem that the opening of the paper container is pushed up by the lector and does not stop occurs.

FIG. 8 is a spout stopper that combines one embodiment of the present invention and the second embodiment, FIG. 8-1 is a cross-sectional view thereof, and FIG. 8-2 is a plan view as seen from the bottom side (inner side of the container). FIG. 8-3 is a plan view seen from the outside.
In an example in which a plurality of annular recesses are provided on the inside and outside of a soft flange, the container has improved both fusion and decomposability.

The present invention is a paper container in which the spout stopper as described above is ultrasonically fused to the opening.
The material of the spout 1 is a material that has good adhesion to the sealant layer used in the container body, has high resistance to stress cracking, is hardly affected by the contents, and has a moderate rigidity. There must be something easy to capping.
Therefore, the material usable for the spout stopper 1 is preferably polyethylene having a density of 0.900 to 0.950, such as low density polyethylene, linear low density polyethylene, etc., but medium density polyethylene, low density and high density. A resin in which a mixed resin of polyethylene, an ionomer resin, an ethylene vinyl acetate copolymer is added to and mixed with the above can also be used.
Among these, linear low density polyethylene is preferable. When actually used, after molding using various resins, it is fused to the paper container body, and the content to be filled is used to conduct an environmental stress cracking test and make a judgment.

The paper container used in the present invention is a container mainly made of paper as a base material, and the base paper is a paperboard having a basis weight of 200 g / m ² to 800 g / m ² , when printing on the surface, Court manila, coatball, ivory, etc., which are white on one side can be used. Furthermore, since it is necessary to heat-seal the periphery of the opening of the container, a thermoplastic film excellent in sealability such as a thin polyethylene film of 15 μm to 100 μm, an ethylene / vinyl acetate copolymer, or a polypropylene film on the back sealant layer. Is used.
Among these, linear low-density polyethylene having a density of 0.925 g / cm 3 or less, a melt index of 4 g / 10 min or more, and a thickness of 30 to 100 micrometers is particularly preferable as the sealant layer.
In order to protect the edge of the paper container, it is desirable to provide the sealant layer on the front side.
Also, aluminum foil with high barrier properties, aluminum-deposited polyethylene terephthalate, metal oxide-deposited polyethylene terephthalate, saponified ethylene / vinyl acetate copolymer, and polyamide resin with high fracture resistance between the base paper and the sealant layer Alternatively, a laminated film may be attached.
For example, from the outside, polyethylene / paper / polyethylene,
Polyethylene / paper / polyethylene / inorganic oxide vapor-deposited polyethylene terephthalate / polyethylene,
Polyethylene / paper / polyethylene / aluminum-deposited polyethylene terephthalate / polyethylene,
Polyethylene / paper / polyethylene / aluminum foil / polyethylene terephthalate / polyethylene,
Configurations of polyethylene / paper / polyethylene / ethylene vinyl acetate copolymer saponified product / polyethylene, polyethylene / paper / polyethylene / adhesive resin / polyamide / adhesive resin / polyethylene, and the like are conceivable.
These can be easily manufactured using a dry lamination machine or an extruder lamination machine.

  Specific examples of the present invention will be described below.

<Example 1>
As a constitution, from the outside, polyethylene (thickness 20 micrometers) / paper (basis weight 400 g / m ² ) / polyethylene (thickness 20 micrometers) / silicon oxide deposition (deposition thickness 60 millimeters) / polyethylene terephthalate (thickness 12 micrometers) ) / Polyethylene (thickness 20 micrometers) / linear low density polyethylene (thickness 40 micrometers).
The outer shape and the crease were given to the laminated sheet according to the developed view shown in FIG. 3, and a liquid paper container having a capacity of 1 liter was obtained on the bottom of 70 mm in length and width.
The spout stopper 2 was a spout stopper having the shape shown in FIG. 1 and was manufactured by injection molding a low density polyethylene resin.
For splicing the spout stopper and the paper container, an ultrasonic fusing machine having a frequency of 20 KHz was used, and fusing was performed under the conditions described in Example 1 in Table 1.

<Example 2>
As a configuration, the same laminated sheet as in Example 1 was prepared, and the laminated sheet was subjected to outer shape and crease according to the development shown in FIG. A liter liquid paper container was obtained.
The same spout 2 was used as in Example 1.
For splicing the spout stopper and the paper container, an ultrasonic fusing machine having a frequency of 20 KHz was used, and fusing was performed under the conditions described in Example 2 in Table 1.

<Comparative Example 1>
As a configuration, the same laminated sheet as in Example 1 was prepared, and the laminated sheet was subjected to outer shape and crease according to the development shown in FIG. A liter liquid paper container was obtained.
As shown in FIG. 10, the spout stopper 2 was manufactured by injection molding the same low density polyethylene resin as in Example 1 using a stopper having only one annular recess.
For splicing the spout stopper and the paper container, an ultrasonic fusing machine having a frequency of 20 KHz was used, and fusing was performed under the conditions described in Comparative Example 1 in Table 1.

<Evaluation test contents>
About the Example and the comparative example, it tested by the following method and compared and evaluated.
<Deformation of spout stopper>
It was confirmed that the spout plug was not deformed by the ultrasonic fusion vibration, and the whole spout plug was not deformed or the flange of the annular recess was not deformed.
The whole spout stopper and the flange of the annular recess are not deformed.
The entire spout stopper and the flange of the annular recess are deformed ×,
A case where only the whole spout stopper or only the flange of the annular recess was deformed was indicated by Δ. <Liquid leakage from spout tap>
Check that the spout is not ultrasonically welded and the flange of the annular recess is broken, causing a tear or a hole. Make 5 pieces, and put water upside down as the contents. It was left for 3 days and checked for leaks. The case where there was no leakage of 5 pieces was marked as ◯, and the case where even one piece was leaked was marked as x.
<Breakability when disassembling the spout plug (easy degradability)>
Folded at the easy folding line of the paper container passing through the center of the spout stopper, the flange of the annular recess of the spout stopper can be easily broken and removed, or three general housewives, three in total, handing 9 Eight or more paper containers made within a second were marked with ◯, five or more up to seven, and △, four or less.
<Adhesion of spout stopper with paper container>
5 liters of each container was filled with 1 liter of water, turned upside down and allowed to stand for 7 days to check whether the liquid leaked. 5 items that did not leak for 7 days ◎ 4 items that did not leak for 7 days and 1 item that did not leak for more than 5 days ○ 3 items that did not leak for 7 days and 2 items that did not pass for more than 3 days Δ, less than that is marked with ×.

  <Evaluation results>

  In Example 1, there were no problems with the deformation, liquid leakage, and close contact of the spout stopper, and nine spout stoppers could be removed with ease.

  In Example 2, there was no problem with the deformation of the spout stopper and liquid leakage, and only one piece of liquid contact was slightly leaked on the seventh day. In addition, it was possible to reliably remove nine spout stoppers for easy decomposability.

  In Comparative Example 1, the spout stopper was deformed and the upper surface plate of the attached paper container was distorted. Moreover, although there was no liquid leakage, the adhesion test showed variations and a problem occurred in adhesion. Further, in the easy decomposability test, there was no decomposability at all, and a blade such as a scissors or a knife was required to remove the spout stopper.

  When evaluated comprehensively, the paper container fused with the spout stopper of the present invention is less likely to leak, and can be easily obtained by simply folding the paper container along a fold line passing through the center of the fused part of the spout stopper. Easy to break and disassemble.

The present invention is as described above. Since the ultrasonic fusing property is good, it can be fused in a short time, the productivity is high, and a knife such as a knife is used to remove the spout plug for disposal. Since it can be disassembled without being disassembled, it is safe and has little burden on the person who disposes it. Since it is particularly easy to disassemble, it can be expected that the number of people who discard it with the spout stopper attached will be reduced.
Moreover, since the present invention simply adds an annular recess to the mold of the spout stopper, the advantages of the present invention are great, such as no change in production equipment and high mass productivity.

DESCRIPTION OF SYMBOLS 1 ..... Paper container 100 ..... Folding line 110 ..... Upper part 111 ..... Upper inclined surface 114 ..... Upper back inclined surface 122... Front side surface 124... Back side surface 16... Opening 2. ········· flange portion 211 ······································································ ··························································································· • ······· Closed plate 2311 ··· Pull ring 2312 ··· Pillar 24 ·············································· ... meat stealing 25 ........ annular recess of the base (fusion side)
251 ... ・ ・ Outer annular recess (fused side)
252 ・ ・ ・ ・ ・ ・ ・ Inner annular recess (fused side)
253 ... ・ Rib (fused side)
3 ········ Cap 4 ········ Horn (ultrasonic fusion machine)
A ····· Outer rib thickness (outer annular recess)
B ......... Inner ring rib thickness (inner ring recess)
CA: Flange thickness (outer annular recess)
CB: Flange thickness (inner annular recess)
D ... Ring width (annular recess)
DA ... Width DB of outer annular recess ... Width of inner annular recess

Claims (12)

A spout stopper used by fusing to a paper container opening,
A cylindrical side wall;
A disc-shaped flange provided to extend outward from the vicinity of the lower end of the side wall;
On the inner diameter side from the fusion region with the paper container opening of the flange portion, the annular recess is arranged by being partitioned by a plurality of ribs,
A spout stopper characterized in that a plurality of the annular recesses are provided concentrically. A plurality of concentric circular recesses are provided on the bottom surface opposite to the side wall of the flange portion,
The spout stopper according to claim 1, wherein the inner inner annular recess forms a planned cutting portion.   The spout stopper according to claim 1 or 2, wherein the innermost inner diameter of the inner annular recess provided in plurality is set in the vicinity of a boundary between the flange and the standing wall of the side wall pedestal. The rib of the annular recess provided in plurality is formed such that the rib position of the inner annular recess adjacent to the inside and outside and the rib position of the outer annular recess are shifted from each other. Spout tap.   The spout stopper according to any one of claims 1 to 4, wherein the plurality of annular recesses are provided with the same number of inner annular recesses and outer annular recesses.   The spout stopper according to any one of claims 1 to 5, wherein the plurality of annular recesses having a rib shape has a rib thickness A of the outer annular recess larger than a rib thickness B of the inner annular recess.   The thickness C of the flange portion in the plurality of annular recesses is thinner than the inner ring rib thickness B of the inner annular recess and thinner than the ring width D of the annular recess. The spout stopper described in 1.   The spout stopper according to any one of claims 1 to 7, wherein a thickness C of the flange portion in the plurality of annular recesses is 0.2 mm or more and 0.3 mm or less.   The concave shape of the plurality of annular recesses is provided with an R at the leading end of the outer annular recess in the width direction and a corner with no R or a small R at the leading end of the inner annular recess in the width direction. The spout stopper according to any one of claims 1 to 8, wherein A spout stopper used by fusing to a paper container opening,
A cylindrical side wall;
A disc-shaped flange provided to extend outward from the vicinity of the lower end of the side wall;
In the fusion region of the upper surface that is the side wall side of the flange portion, the annular recess is arranged by being partitioned by a plurality of ribs,
A spout stopper characterized in that a plurality of the annular recesses are provided concentrically.   The spout stopper according to claim 10, wherein the plurality of annular recess ribs are formed such that a rib position of the inner annular recess adjacent to the inside and outside and a rib position of the outer annular recess are shifted from each other.   A paper container comprising a laminated sheet using paper as a base material, wherein the spout according to any one of claims 1 to 11 is ultrasonically fused.

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